Method

In small bowl, whisk together oil, vinegar, mustard, garlic, Worcestershire sauce (if using), salt and pepper. Brush over tops and bottoms of mushrooms; let stand for 10 minutes. Place on greased grill over medium-high heat; close lid and cook, turning once, for 10 minutes or until browned and tender.

Meanwhile, cut rolls in half horizontally. Spread bottom halves with mayonnaise; top each with tomato slice and mushroom. Sprinkle with cheese; top with remaining halves of rolls. Return to grill; cook, turning once, for 2 minutes or until rolls are crisp and cheese is melted.